Proton Driver Study II

In a charge dated January 10, 2002 (Appendix 3), the Fermilab Director requested a design study for a high average power, modest energy proton facility. As pointed out in the Director's charge, the HEPAP Subpanel report identified such a facility as a possible candidate for a construction project in the U.S. starting in the middle of this decade. The worldwide renaissance in neutrino physics gives added impetus to this call. An intensity upgrade to Fermilab's 120-GeV Main Injector represents an attractive concept for such a facility, which would leverage existing beam lines and experimental areas and would greatly enhance physics opportunities at Fermilab and in the U.S. The key technical element in such an upgrade is the replacement of the 8-GeV Booster, which provides beam to the Main Injector. This new machine, dubbed the "Proton Driver", has potential for a significant stand-alone physics program in addition to its primary mission of providing input beams for the Main Injector. This report is not yet complete and is being issued now in a preliminary version with limited distribution. When completed the report will be in three parts. Part A describes an 8-GeV synchrotron-based proton driver. Part A is a continuation and extension of Proton Driver Study I (PD1), completed in December 2000 and documented in FERMILAB-TM- 2136. Part B describes modifications and upgrades of the Main Injector (MI) and associated beam lines. Part C describes an 8-GeV superconducting proton linac, an interesting alternative option to the synchrotron-based injector. Part A, the description of a synchrotron-based proton driver is complete. The material for part C is not yet finished. When part C is finished it will be incorporated into this report, and part B, will be expanded to cover the impact on the Main Injector and beam lines of either proton driver option. A physics study focusing on applications of the Proton Driver is completed at Fermilab and a report is published elsewhere. [1]